package pl.edu.agh.bd2.servlets;

import java.io.IOException;
import java.util.Date;
import java.util.HashSet;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import pl.edu.agh.bd2.domain.Grade;
import pl.edu.agh.bd2.domain.GradeType;
import pl.edu.agh.bd2.domain.Student;
import pl.edu.agh.bd2.domain.Subject;
import pl.edu.agh.bd2.util.HibernateDAO;

/**
 * Servlet implementation class NewGradeServlet
 */
@WebServlet("/newGradeServlet.do")
public class NewGradeServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public NewGradeServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		HttpSession session = request.getSession();
		
		HibernateDAO<Grade> dao = new HibernateDAO<Grade>();
		
		Student st = null;
		GradeType gtt = null;
		
		for(Subject subject : (HashSet<Subject>)session.getAttribute("subjects")){
			if(subject.getName().equals((String)session.getAttribute("selectedSubject"))){
				for(Student student : subject.getStudents()){						
					if((student.getFirstName() + " " + student.getLastName()).equals((String)session.getAttribute("selectedStudent"))){
						st = student;
						for(GradeType gt : subject.getGradeTypes()){
							if(gt.getName().equals((String)session.getAttribute("selectedGradeType"))){
								gtt = gt;
								break;
							}
						}
					}
				}				
			} 
		}	
		
		Grade grade = new Grade(Double.parseDouble((String)request.getParameter("grade")),new Date(),gtt,st);
		
		st.addGrade(grade);
		
		dao.persist(grade);
		
		RequestDispatcher view = request.getRequestDispatcher("/subjectInfo.jsp");
		view.forward(request, response);
	}

}
